Phylogenetics and Integrative Taxonomy of African Water Snakes (Squamata: Colubridae: Grayia)

鳞片 唇形科 分类学(生物学) 生物 系统发育学 动物 进化生物学 遗传学 基因
作者
Teslin Chaney,Olivier S. G. Pauwels,Zoltán T. Nagy,Václav Gvoždík,Chifundera Kusamba,Gabriel Badjedjea,Franck M. Masudi,Jeannot B. Akuboy,Raffael Ernst,Jean‐François Trape,Laurent Chirio,William R. Branch,Chad Keates,Van Wallach,Ange‐Ghislain Zassi‐Boulou,Eugene R. Vaughan,Eli Greenbaum
出处
期刊:Herpetological Monographs [Illinois Natural History Survey]
卷期号:38 (1)
标识
DOI:10.1655/herpmonographs-d-23-00002.1
摘要

Grayia Günther 1858 is a genus of relatively large (1.2–2.5 m) aquatic Afrotropical snakes. Recent molecular phylogenies recovered Grayia in its own distinct subfamily (Grayiinae), which was supported as the sister group to Colubrinae. Tropical African snakes are generally understudied, so the relationships within Grayia are poorly known. High degrees of intra- and interspecies variation can make identification difficult, and previous studies involving Grayia included misidentified specimens in other genera. The goal of this study is to create a phylogenetic tree that can be used to understand the relationships and taxonomy of Grayia via an integrative taxonomic approach that combines molecular data for 60 specimens and morphological data for 719 specimens. Two nuclear (BDNF, NT3) and four mitochondrial genes (COI, cyt b, 16S, and ND4) were used to construct phylogenetic trees with Maximum Likelihood and Bayesian Inference algorithms. The phylogenetic trees recovered two clades, Grayia caesar + G. tholloni and G. ornata + G. smythii, which the time-calibrated Bayesian Evolutionary Analysis Sampling Tree (BEAST) analysis estimated to have diverged from each other in the mid-Oligocene. This deep divergence, combined with distinct morphological differences, led us to resurrect the name Xenurophis Günther 1863 as a subgenus [G. (Xenurophis) caesar, G. (Xenurophis) tholloni]. Molecular and morphological evidence further supports a new cryptic species of Grayia from the Upper and Middle Congo River and its tributaries. This new species is estimated to have diverged from its nearest sister species, G. ornata, in the Late Miocene—which coincides with the divergence dates of sister taxa within other Central African snake genera. Grayia ornata sensu stricto was found to consist of several evolutionary lineages, which mirror the patterns recovered in other Central African vertebrates.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
兴奋的定帮应助无情招牌采纳,获得10
1秒前
Steven驳回了ding应助
1秒前
1秒前
2秒前
Alex应助卡乐瑞咩吹可采纳,获得20
3秒前
3秒前
Orange应助武雨寒采纳,获得10
4秒前
米粒完成签到,获得积分10
4秒前
Tomma发布了新的文献求助10
5秒前
研友_qZAe6Z完成签到,获得积分10
5秒前
成功应助yier采纳,获得10
5秒前
6秒前
mojojo完成签到 ,获得积分10
7秒前
YAMO一发布了新的文献求助10
7秒前
火星上采梦完成签到,获得积分10
8秒前
8秒前
9秒前
阿拉灯给阿拉灯的求助进行了留言
9秒前
MBL发布了新的文献求助10
10秒前
所所应助啦啦哗啦啦哗采纳,获得10
10秒前
10秒前
刘智山完成签到,获得积分10
11秒前
777完成签到,获得积分10
11秒前
年轻的宛发布了新的文献求助10
12秒前
serendipity发布了新的文献求助10
12秒前
今后应助ZXB采纳,获得10
13秒前
情怀应助Molly采纳,获得10
13秒前
我是老大应助YY采纳,获得10
14秒前
14秒前
呢呢发布了新的文献求助10
14秒前
15秒前
木子发布了新的文献求助10
15秒前
聪慧小霜应助愉快的宛儿采纳,获得10
15秒前
Ashore发布了新的文献求助10
16秒前
16秒前
YAMO一完成签到,获得积分10
16秒前
serendipity完成签到,获得积分10
16秒前
17秒前
缓慢的白开水完成签到,获得积分10
17秒前
鸡鱼蚝发布了新的文献求助10
20秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 700
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
Indomethacinのヒトにおける経皮吸収 400
Effective Learning and Mental Wellbeing 400
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3975900
求助须知:如何正确求助?哪些是违规求助? 3520207
关于积分的说明 11201602
捐赠科研通 3256663
什么是DOI,文献DOI怎么找? 1798403
邀请新用户注册赠送积分活动 877564
科研通“疑难数据库(出版商)”最低求助积分说明 806430